Prospecting-drill.



H. R. AMELING.

PBOSPBGTING DRILL.

APrLIoAnon rILnD rnn.11,191o.

Patented July 11, 1911.

NHL

I f L Zllzzesses:

HEBMAN R. AMELING, OF DECATUR, ILLINOIS.

PROSPECTING-DRILL.

Specication of Letters Patent.

Patented July 11, 1911.

Application led February 11, 1910. Serial 110.543,308.

To all 'whom it may concern:

Be it known that I, HERMAN R. AMnLING, a citizen of the United States, and a resildent of the city of Decatur, in the-county of Macon and State of Illinois, have invented a certain new and useful Improvement in Prospecting-Drills, of which the following is a specification.

This invention relates to prospecting drills and more particularly to core drills of the double-tube type for use in boring through softrock, coal, clay, etc.

In prospecting, it is desirable, and in many cases an absolute necessity, that the entire core be held intact in order to determine the nature and condition of the layers or strata from which the core is taken.-

In practice, however, it has' been found that the softer material is frequently washed away by the water coming 1n contact with the core above the cutting portion of the bit. Therefore, in many cases it has been'practically impossible to extract a perfect core. In such a case it is difficult to determine the exact nature and condition of the missing port-ion of the core or the location and thickness of a particular layer or stratum from which the missing portion of the core was taken.

My invention has for its principal objects to secure a perfect core; to provide for adjusting and interchanging the cutting bits to suit different conditions; to avoid the disadvantages of the devices heretofore used and to attain certain other advantages hereinafter more fully appearing.

The invention consists in the parts and in the arrangements and combinations of parts hereinafter described and claimed. I

In the accompanying drawingsv which form part of this specification and wherein `like symbols refer to like parts wherever they occur, Figure 1 is a longitudinal section through a double-tube core drill ernbodying my invention and equipped with a chisel-edge core bit; Fig. 2 is la fragmentary section ofthe cutting portions of the bits as shown in Fig. 1; Fig. 3 is a longitudinal section showing a modified arrangement of the drill; and Fig. 4 is a fragmentary section of the cutting portions of the' bits shown in Fig. 3.

Referring now more particularly to Figs. l and 2 of the drawings, the device comprises an outer tube or barrel 1 which is detachably secured at its upper end to a coupling member 2. The connection between the barrel 1 and coupling 2 may be effected` in any desirable manner, but preferably by a screw thread, as shown. The coupling member 2 has a screw-threaded bore 3 which is adapted' to receive theV end portion of a pipe or tube (not sho'wn) which is attached to the actuating device of the machine and- -through which'water is conducted to the tube 1 in the ordinary manner. A n inner tube or core barrel 4 is tted loosely inside of the tube 1, there being suiiicient space be- .s

tween the two vtubes to permit free circulation of water therethrough. The upper end portion of the inner tube or barrel 4 is internally screw-threaded and secured to a tubular bushing 5 which is provided with an annular shoulder against which the end of the tube 4 abuts. Swiveled in the bushing 5 is a cylindrical stem 6 ,which is screw threaded so as to lit in a threaded bore 7 in the coupling member 2. A' jam nut 8 is mounted on the stem 6 and adapted to impinge against the end of the coupling member 2 whereby said stem may be locked in adjustedV positions lengthwise 0f said coupling member. provided with a collar or annular shoulder 9 whichrotatably lits the bore of the bushing 5. On opposite sides of the collar 9 are antifriction bearings 10, the upper bear` ing being retained by an internal annular shoulder 5al at the upper end ofthe bush ing and the lower bearing by a screw-plug 11 in the lower end of the bushing. By this arrangement, the tubes 1 and 4 are independently rotatable but held against independent endwise movement except for adjustment. On the lower end of the tube 1 is secured an annular bit 12 whose cutting end and circumferential edge portion may be studded with diamonds or crystals in the usual manner. The diameter of the opening at the cutting end port-ion of the an- The stem member 6 is bit, whereby an internal annular shoulder is provided. The bit is notched or lslotted as at 13, and said notchesor slots extend above the internal annular shoulder, preferably at four diametrical points. However, any desirable number of notches may be provided. -As shown in Fig. `1, the lower end of thefcore barrelor tube 4 is externally screw-threaded and it has secured thereon an tannular core bit 14. The opening in thelower part of the bit 14 is contracted or of less diameter bore of the inner barrel 4 and the'lower port-ionmf the bit is tapered as at 15 to a sharp cuttin or chiseledge. In boring through very so material, 4the inner barrel or tube 4' is adjusted with respect to the outer tube or barrel 1 so that the chisel-edge of the bit. 14 extends a short distance beyond the end face of the cutting bit 12. In the operation of the drill, the inner barrel 4 by reason of its bit 14 pressing ahead of the bit 12 on the outer tube 1 and`owing, also, to the arrangement of the antifriction bearings 10 and swivel stem 6, said inner barrel 4 is held from rotation while the outer tube 1 with the cutting bit 12 thereon is being rotated. The water` which is conducted through a chamber 2a and passageways 2b in the coupling member 2 and into the upper part of the tube 1, 1s forced through the space between the two tubes 1 and 4 and passes out through the notches'13 in thebit 12. Itis noted that, as the core bit 14 projects ahead of the bit 12, the water will not come in contact with the core which is forced up into the inner tube 4 as the drill progresses. Port openings 16 are provided in the core barrel 4 near the upper end thereof so that the confined air is permitted to escape into the space between the tubes 1 and 4 and thereby prevent the formation of an air cushion on top of thecore which would retard the progress of the drill or prevent the core from entering the tube the full length thereof. B adjusting the swivel stem 6 lengthwise ofy the coupling member.` 2, the cutting edge of the core bit 14 may be adjusted to dierent positions relative to the cutting end of the outer bit 12, as it is obvious that the chisel edge of the bit 14 may be either flush with the cutting edge of the bit 12 or some distance ahead of the same, depending upon the condition or hardness of the material which is to be drilled.

When boring through hard coal or very hard material, a core bit 17 havino` a blunt` end is substituted for the chisel edge bit 14 on the inner tube 4 as shown in Figs. 3 and 4 of the drawings. This bit 17 is provided with nitches 18 in its peripheral edge portion which are arranged to r ister with the slots 13 in the bit 12. In this case, the

bottom faces of the two bits 12 and 17 are set preferably Hush with each other and, except where the slots 13 in the bit 12 and nitches 18 in the bit 17 respectively register, said bits fit snugly together all around their cutting edges, as more clearly shown in Fig. 4. Preferably, the core bit 17 is reduced in diameter at its lower end so'as to fit the contracted opening at the lower end of the outer bit 12. In this case, also, the antifriction` bearings 10 are removed and the collar 9 on the swiveled stem 6 is moved up against the end shoulder 5 of' the bushing 5 and a block or blocks 19 areinserted in the bushin The blocks 19 are of such thickness or ength-that the screw-plug 11 will bear against the same when .screwed into the bushing and thereby' clam the collar 9 on the swivel stem 6 tight in the bushing. To guard against the sw1vel stem turning independently of the bushing 5 should the clamp become loosened, it is preferable to provide holes 20 in the end of the bushing 5 and also provide holes in the collar 9 so as to register with said holes 20 and insert pins 21 therein. By this arf rangement, the ,two tubes 1 and 4 are fixed so as to rot-ate together.

A rounded annular shoulder 22 is provided on the inner side of the bits 14 and 17 above the contracted openings at the cutting ends thereof on which the bottom edge portion of the core will rest when the drill is withdrawn. To extract the core from the inner tube, the outer and inner tubes are respectively disconnected from the coupling 2 and the bushing 5 is removed from the inner tube or core barrel 4. The core may be then removed from the barrel 4 through the end from which the bushing 5 is removed.

By the construction and arrangement of the device hereinset forth the parts can be readily adjusted and interchanged to drill soft and hard materials and the core can be extracted intact notwithstanding that it is taken from layers or strata of material of different character.

Obviously, the device admits, of considerable modification without departing from myinvention. Therefore, I do not wish to be limited to the exact'construction and arrangement shown.

lVhat I claim is:

1. A rotatory core drill comprising an outer barrel having an annular cutting bit on the end thereof and an inner core barrel having an annular bit on the end thereof, the cut' ting endof said inner bit beingextended ahead of the cutting end of said outer bit and said outer and inner barrels being xed against endwise movementindependently of each other.

2. A rotatory core drill comprising an outer tube having an annular cutting bit on the end thereof and a core tube swiveled within said outer tube so as to rotate inde pendentl thereof, but being fixed against mdepen entl endwise movement, said core tube bein of a diameter less than the diameter o the bore of said outer tube and having an annular core bit on its end, the cutting end of said core bit bein projected ahead of tlie cutting end of the it on said outer tube,

l 3. A rotatory core drill comprising 'an outer tube having an annular cutting bit on the end thereof and a core tube swiveled inside of said outer tube and adjustable lengthwise thereof, lmeans f or securing-said outer and inner tubes in adjusted position lengthwise with respect to each other, said core tube having lan annular core bit on its end in coperative relation to the cutting bit on said outer tube, the annular cutting bit on the outer tube being no'tchedat its cutting edge and said annular bit on the coretube being continuous and imperforate; 4. A rotatory core drill comprising an Qt I i outer tube yand a core tube swiveled inside of 5. A rotatory core drill comprising an outer tube having an annular cutting bit on the end thereof and a core tube swiveled inside of said outer tube and having an annular chisel biton the end thereof, the cutting edge of said ou'terbit being notched and the cutting edge of said chisel bit being continuous and projected ahead of the cutting end of said outer bit and said outer and inner tubes being fixed against endwise move'- 35 ment independently of each other,

6. A core drill comprising an outer tube Vhaving an annular cutting bit on the end thereof and a core tube swiveled inside of said outer tube and adjustable lengthwise 40 thereof, said core tube having an annular chisel bit on its end in coperative relation to said outer bit and means for securing4 said outer and inner tubes in adjusted posi` tion lengthwise -with respect to each other. 7. rotatory core drill comprising a coupling member which is adapted to be connected to a water supply pipe, and having a water passageway therein, an outer tube secured to said coupling member, a core `barrel inside of said outer tube, said core barrel being of a diameter less than the diameter of the bore of said outer tube, an axial swivel member connecting said core barrel with said coupling member, an annular bit secured on the end of said outer tube and having water outlet openings in its cutting edge portion, and an annular core bit secured on the end of said core barrel in coperative relation to said first? mentioned bit, said annular core bit having an unbroken inner face, and having notches in the outer face at its cutting edge portion, said notches being arranged and adapted to coperate with the water outlet openings in the cutting edge portion of said outer bit.

8. A rotatory core drill comprising a coupling member which is adapted to be connected to a water Supply pipe and having a water passageway thereln, an outer tube se-l cured to said couplin member, a core barrel mounted inside of said outer tube, saidl core barrel being of a diameter less than the interior of said outer tube, an axial swivel mex'nber connecting said coupling member and said core barrel, whereb the latter is permitted to rotate indepen ently of said outer barrel tube, but fixed against independent endwise movement, an annular cut. ting bitsecured onfsaid outer tube, and an annular core bit secured on the end of said core barrel, said core bit being extended ahead of the cuttin end' of said first menioned bit and havmg'an unbroken inner ace.

'9. A rotatory core drill comprising a cou- 85 pling member which is adapted to be -coni nected toa water supply pipe and having a water passageway therein, an' outer tube secured to said coupling member, a core tube inside of said outer tube, said core tube being of a diameter less than the diameter of the bore of said-.outer tube, an axial mem-v ber swiveled in said core tube and being adjustable lengthwise with respect to said coupling member' whereby said core tube may. 95

e adjusted lengthwise with respect to said outer-tube, an annular cuttingbit mounted 011 the end of said outer; tube, and a core bit mounted on the end of said core tube in coperative relation to said -irst men- 10 tioned bit.

10. A core drill comprising an outer tube,

a core tube mounted within said outer tube, and an interchangeable connection between said outer tube and said core tube whereby 10 the same may be held against-independent endwise movement and either held against independent rotation or permitted independent rotation when desirable.

11. A core drill comprising an outer tube, 11*

a core tube mounted within said outer tube,

said core tube being of a diameter less than the bore of said outer tube, an annular cutting bit mounted on the end of said outer tube, a corebit mounted on the end of said 111 core tube in coperative relation `to said outer bit, and an interchangeable connection between said outer tube and said core tube'whereby the Same may befheld againstA independent endwise movement and either l2* held against independent rotation or permitted independent rotation when desirable.

12. A core drill comprising an outer tube having an annular cutting bit on the end thereof, a core tube mounted within said 121 outer tube and having an annular core bit on its end in coperative relation to said outer bit, and an interchangeable and longitudinally adjustable connection between said outer tube and said core tube whereby 13' the same muy be adjusted lengthwise with respectto each other but are held against independent endwise movement after adjustment is effected and whereby, also, they vSigned at St. Louis, Mo., this 7th day of February 1910.

HERMAN R. AMELING.

Witnesses G. A. PENN'INGTON, J. B. MEGOWN. 

